New data from Experian Hitwise show that Google continued to widen its lead in the U.S. search market last month. Google accounted for 66% of searches in September, gaining by 2%, while Bing and Yahoo lost ground by 3% and 2% respectively. The remaining 66 search engines analyzed by Hitwise powered 5.8% of U.S. searches.

But for how long will this kind of search query dominate the way we find things on the Web? With today’s release of iOS 5, Apple – Google’s mobile rival – sets the stage for Siri, an artificially intelligent voice search assistant that goes out of its way not to use Google to find results. Google is winning the search game, but Apple is about to change it.